Parr Mods + setup

[johnag007]

Just back from Silverstone trying my new setup, briefly:
1- Pagid brakes, braided fuel lines
2- Progressive springs
3- Cargraphics exhaust + remap
4- Parr stage 1 suspension setup

Brakes do not squeal on the circuit, much more positive / progressive shove, bitting much earlier compared to before
Springs are very good, but are just too compromised for the road (-25m)
Engine is magnificent, not so much power (can anyone honestly get a real quick out of 20bhp more) BUT the gear changes are much smoother as they match revs much better, power is now extremely linear, including through gears, great feeling. This is at the expense of a bit of low end tractability. The exhaust makes a far better noise than PSE (anyone wants my 2nd hand one?)
Suspension setup removes the "chewing gum" feel between steering and tyres.
All in all, if I had to do it again, would do the same except the progressive springs, just to see the difference they would make, and then decide separately (anyway kept the originals). Highly recommend it.

 

[swoody]

Did my first Track day at Silverstone on Wednesday, like the sound of the suspension mods removing that "chewing gum" feeling.
In what way are the spring to compromised for the road?
Ride hight, Ride quality, how well do they work with the PASM?

The car felt great round silverstone, strong brakes and even tyre wear, I would just like it to feel more positive on turn in. I think the car would look better lower too, do you have any photo's?

 

[johnag007]

Regarding tyres, how much were you pushing the car? I completely destroyed the side walls over 3 trackdays, found uneven wear, mostly left front tyre, specifically outside thread pattern. Suspension geo is to blame.

The progressive springs lower the car by 25mm. This is just too low for London, the car scrapes too often.

I would say get Parr to do a Stage 1 suspension mod, toe in + camber I believe. Turning is much better, the car feels "hard wired" compared to this chewing gum feel. Geo setup will not cost anything much, and no hardware is replaced. I would put on braided brake lines just in case since they are so cheap. Regarding springs, depends on where you live, how much you track your car. All in all, I should have done the mods in 2 stages to feel the difference properly.

Oh and no pics, thought I had forgotten my camera (of course I did not)

 

[YvesD]

Engine is magnificent, not so much power (can anyone honestly get a real quick out of 20bhp more) BUT the gear changes are much smoother as they match revs much better, power is now extremely linear, including through gears, great feeling. This is at the expense of a bit of low end tractability.

johnag007,

Can you give us a more indepth analysis of the remap characteristics please ? Also, how noisy is the Cargraphic exhaust compared to PSE for example ?

Take it you are running the 'standard' motor and not X51?

Yves

 

[swoody]

I tried to keep the car from sliding (predominantly underseer) to conserve the tyres. I had an E46 M3 before the 911 and that used to destroy the front left shoulder, but no issues with the 911. Took somw advice from the guys who looked like they knew what thay were doing, and adjusted tyre presures to 32F & 34R when hot.

 

[johnag007]

Remapping standard S engine (not X51): can be broken down into 3 parts (this is personal feel)
1- Less tractable until 1250rpm, I stalled once or twice not expecting to
2- Much smoother/linear going up the rev range, no hesitation. From 4000rpms, things continue to pick up well rather than have a hesitation then quick
3- The best thing is that shifting up/down a gear (say 3 to 4) from 6000 down 4000 going up now feels very well matched, no "shunting", very seemless. It feels liket power delivery + noise is not affected by gear change, but are matched so well. Now that puts a smile. Downshift are as good, once again their is something within the powerband which is just seem perfectly matched.

NB: they remapped with the exhaust, therefore some of this is due to the change, I do not know which part

Noise: slightly quieter than PSE, noise is not broken down into 2 parts rather a more groveling PSE. Noise is linear and higher pitch, exaggerating but a bit as if you went from a propellor plane to a jet. It finishes off with a proper sports noise. All in all, much better noise and less "on/off" to pass noise tests. There is a more noisy exhaust which I believe tops off at 105-106db, maybe higher.

Swoody, regarding sliding I found that more than 20mns on the circuit overcooks the tyres and, depending on your suspension settings, sliding of some kind happens. In my own case, having spent 30mns out the 1st time at Castle Combe and not having bled my tyres I destroyed the shoulders. I now know better than to scrape off GBPs in such a way. On the other hand 34R is rather low, what tyres do you have? I got different views from the Michelin tester via the tyre guys running at 36-40.

The best thing is to get a test drive next time on the circuit, although please, as I am not a very good driver (yet), do not expect too much! We can also swap cars for a couple of laps for the less faint hearted

.

 

[swoody]

Johnag007,

I only stayed out for 20min sessions, including the slow down lap. I have conti-sport 2's fitted, those were all I could get hold of in April.

I was planning on doing Oulton Park in October, and mat be Castl Combe in September.